A 59.0-kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.840 m around the pole. (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. 1068.32 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. kN (b) Compare this force with her weight. Frope =

A 59.0-kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.840 m around the pole. (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. 1068.32 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. kN (b) Compare this force with her weight. Frope =

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Two identical twins hold on to a rope, one at each end, on a smooth, frictionless ice surface. They skate in a circle about the center of the rope (the center of mass of the two-body system) and perpendicular to the ice. The mass of each twin is 78.0 kg. The rope of negligible mass is 3.5 m long and they move at a speed of 5.40 m/s. a)What is the magnitude, in kg · m2/s, of the angular momentum of the system comprised of the two twins? (b)They now pull on the rope and move closer to each other so that the rope between them is now half as long. Determine the speed, in m/s, with which they move now. (c)The two twins have to do work in order to move closer to each other. How much work, in joules, did they do?
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Current Attempt in Progress X Incorrect For the slender rod of mass m bent into the configuration shown, determine its products of inertia Ixy, Ixz, and lyz. Use the values m = 4.8 kg and b = 360 mm. 55° Answers: Ixy = |xz = lyz = i b 0.2199384932 i -0.2299384932 i -0.05184 55° kg.m² kg.m² kg.m²
A uniform spherical ball, of mass 13 kg and radius 13 cm, rolls smoothly from rest down a ramp at angle 0 = 30°. The ball descends a vertical height 2.2 m to reach the bottom of the ramp. What are the magnitude and direction of the frictional force in Newtons on the ball as it rolls down the ramp? Assume rolling down axis is - x. If required use the free body diagram shown. Take I com = 2/5 MR² for ball as sphere IND sin 0 Ꮎ R 0 P Fcos 0 COS
A car of mass m is negotiating a circular turn of radius R and speed v on a banked road with an angle of banking θ. The forces on the car are shown below. Ignore friction in this problem. Draw a free body of the car. Identify and show the radial direction. Pick coordinate axes with x pointing in the radial direction towards the center of the circle and y in the vertical direction. Show the coordinate axes on the free body diagram. Set up Newton’s Laws in the radial and vertical direction. Which force provides the centripetal force? Use the equations in part C to solve for the speed of the car in terms of R, Does the speed depend on the mass of the car? If R=250.0 m, m=750.0 kg, calculate the speed of the car.
d) At what rate does the cylinder spiñn 2 (8.51). In the amusement park ride shown here, the passengers are against the wall of a cylinder that rotates vertically. The diameter of the cylinder is 16 m. The cylinder rotates once every 4.5 sec. a) Draw a force diagram for a 55-kg passenger at the top of the ride. Show the weight and normal force vectors. b) What is the normal force? How many "g's" will the passenger feel? c) Draw a force diagram for a 55-kg passenger at the bottom of the ride. Show the weight and normal force vectors. ) What is the normal force? How many “g's" will the passenger feel? ation e the ride above is going at the minimum speed for passengers not to fall off. peed, what would the normal force be on a passenger at the top? What would th
A person is pushing a fully loaded 27.50 kg wheelbarrow at constant velocity along a plank that makes an angle a = 37.0° with the horizontal. The load is distributed such that the center of mass of the wheelbarrow is exactly halfway along its length L. What is the magnitude of the total force F, the person must apply so that the wheelbarrow is parallel to that plank? You may neglect the radius of the wheel in your analysis. The gravitational acceleration is g = 9.81 m/s². F =
A 59.0-kg ice skater is moving at 4.07 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.810 m around the pole. red (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. kN (b) Compare this force with her weight. Frope %3D W Need Help? Read It
Please answer vertically, not horizontally so that no steps are miscalculated for this problem. A unicorn is standing on a rotating platform so that it can be admired from every angle. The platform is 5 m in radius and rotates every 8 seconds (otherwise known as 1/8 of a rotation per second). What coefficient of friction must the unicorn's hooves have to keep him from slipping over the edge? This answer is not shown correctly on bartleby. Would he need a higher or lower coefficient of friction to stand closer to the center of the rotating platform? Explain.
Consider the pendulum shown in the figure. The pendulum is released at point A, swings through its lowest point at point C, and reaches its turning point at point D. You may ignore the effects of air resistance. Answer the following questions: A В D C (a) Draw the free body diagram when the object is located at point B. (b) On your free-body diagram, draw a circle around the force components that contribute to the centripetal acceleration and draw a square around the force components that contribute to the tangential acceleration. (c) Draw the direction of the total acceleration vector when the object is located at point B.
Consider the woman doing push-ups in the figure. She has a mass of 49.2 kg, and the distance from her feet to her center of mass is 0.96 m, while the distance from her feet to her hands is 1.75m. a. What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. b. The triceps muscle at the back of her upper arm has an effective lever arm of 1.95 cm, and she exerts force on the floor at a horizontal distance of 15.5 cm from the elbow joint. Calculate the magnitude of the force in newtons for each triceps muscle. c. How much work in joules does she do if her center of mass rises 0.27 m? d. What is her useful power output, in watts, if she does 25 pushups in one minute? For the sake of simplicity, ignore any power used by her muscles lowering her body during each pushup.